Works 'experimental' bike, presumably built by Harry Weslake in '29 when he was head of experimental dep't at Sunbeam - has single-port cylinder head and hairpin springs, 4 speed gearbox. Fast! Posted by the vintagent on 2008-10-22 02:27:31 Tagged: , Sunbeam , vintage , motorcycle Advertise your bike business at Bikes n Customs #bikesncustoms